Mass Air Cleaning
#1
#3
No codes, just rough idle once in a while. Changed plugs and this did not help. Could be the IAC, but the air filter from previous owner was filthy, so I am assuming the wire needs to be cleaned. I see a mesh, which looks very dirty, but wonder if this is what I need to clean? Usually there are two wires in the mass air assembly to clean. I have some mass air cleaner but just want to make sure I am cleaning the sensor properly.
#5
Is this the same procedure for a 2003 disco? I'm curious because i also get a rough idle every once and a while. Today I cleaned the IAC as best I could. Not too much you can do to the thing... Mine wasn't too filthy anyways... Anyways, any help would be much appreciated as usual!
Thanks again,
Thanks again,
#6
Use only MAF or electronic (no residue) cleaner.
Remove the MAF, make sure it's cool, spray 1/2 can thru mesh--rotate Maf around, flip it over, spray the other half thru' other end.
You want liquid to get into the hotwire & rinse it off, but not if the MAF is hot, it may shock the wire.
Let it dry for 5mins. , thro' in a new paper filter (if you didn't already), and you're good.
luck,greg
Last edited by greg409; 04-15-2010 at 09:58 PM.
#7
#8
MAFs usually get dirty from poor filter maint. or oil treated permanant filters
luck,greg
#9
A paper filter is a standard filter such as a wix, napa, etc. Gauze filters such as the K&N are said to contaminate the wires if excessively oiled. I have used K&N fitlers on other vehicles, such as Ford, and have had to clean the MAF wires with the proper cleaner to resolve this issue. I assume the same would hold true for the land rover MAF. The previous owner had a paper filter installed, but is was highly contaminated with gunk and likely gunked up the MAF wire similar to what a K&N would do.
#10
Here is testing done by K&N. It appears they are aware of a possible problem with oil, but it looks like the tests show this may be a myth. I have personally never had a sensor go "bad" from a filter. I have had some with oil, but a cleaning solved this issue. The oil could have been crankcase blow back from all that I know.
http://www.knfilters.com/MAF/MAFTestresults.htm
http://www.knfilters.com/MAF/MAFTestresults.htm